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Glossary of Lighting Terms

Home » Glossary of Lighting Terms
CCT (Kelvin)
CCT stands for Correlated Color Temperature. It is the expression that determines and categorize the color of light source. Color...
Reflector
Optical elements that direct the light through reflection and refraction at a certain angle is called reflector. Reflectors gather light,...
RAL
RAL is a standard color description system used in European countries. RAL stands for Reichs-Ausschuss für Lieferbedingungen in German. It...
Floodlight
Floodlights are usually used for outdoor lighting. Floodlights have huge and strong light. Floodlights can be used for area lighting...
PCB
PCB is used to install electronic circuit equipment. There are conductive paths on it. PCB stands for Printed Circuit Board....
OLED
OLED is a solid-state, semi conductive device which is made up of light-emitting organic materials when the electric current passes...
Luminous Flux (Lumen)
The total light quantity of a lighting device which is emitted in every direction is called luminous flux. The unit...
Illuminance (Lux)
Illumination or illuminance is the total quantity of light per unit area on a surface. The unit of illuminance is...
LM-80
LED technology has longer life span according to previous lighting technologies. However, LEDs tend to gradually deteriorate during the time...
LM-79
LM-79 is a test method which created by Illuminating Engineering Society of North America (IESNA) to measure photometric and electrical...
Lens
Lens is an optical material that controls the light emitted from a light source and allows it to distribute in...
LED
LED is a diode-based electronic circuit element that emits light when the electric current is passed through LED. LED is...
LED Driver
LED is a long-lasting lighting technology with low energy consumption and high light output. This technology requires special power sources...
Infrared
Infrared is electromagnetic radiation which is longer than visible red light, and which have a shorter wavelength than radio waves...
Candela
Luminous intensity is the amount of light emitted by a light source in a specific direction. The unit of luminous intensity...
Glare
Glare is a visual perception caused by light that is scattered excessively and uncontrolled. Exposed to bright sunlight or artificial...
Luminous Efficacy (lm/W)
Luminous efficacy indicates, with how efficiently a lighting equipment converts electrical power into the light. The ratio of light flux...
Light Meter
Devices that measure the light level and light specification are called light meter. Light meter devices are used in lighting,...